Machine tool



June 9, 1925. 1,541,062

J. w. MYERS MACHINE TOOL Filed June 27, 1921 4 Sheet-Sheec 1 INVEN TOR.

ja asm M/Insea ATTORNEY.

June 9, 1925. 1,541,062

J. W. MYERS MACHINE TOOL Filed June 27, 1921 4 Shets-Shet 2 INVENTOR. (T055 61 l/fime;

W ATTORNEY.

June 9, 1925. 1,541,062

J. W. MYERS MACHINE TOOL Filed June 2'7, 192! 4 Sheets-Sheet 5 a. @w ATTORNEY.

June 9, 1 925. 11,551,952

.1' w. MYER$ msnmm T0014 Filed June 2'7, 192; 4 Sheets-Sheet 4 INVENTOR.

Jo'jzw/ #1225 ATTORNEY.

Patented June 9, 1925.

, UNITED S j 1,541,062 PATENT @OZFFICE.

.zrosnrn w. MYERS, or aeoxsonunrcmeen, essrenoarro HIncKLEY-ivrsznnscorr- 'PANY, tor aec rsen, MICHIGAN, A ooaroaa rron.

. .hIAGHIN-E rooL.

Application filed June 27,1921. Serial No. 480,520.

To (EZZ whom, it may concern:

'Be it known that I, JOSEPH W; MYERs,:a citizen ofthe United States,residing at J ackson, county of Jackson, State of Michigan, have invented a certain new and useful Im- .provement in Machine Tools, and declarethe following to be a full, clear, and exact description of thesame, such as will enable others skilled in the art to which it pertains to make and use the same, referenc be ing had to the accompanying drawings, which form a part of this specification.

7 My inventionrelates to machinetools and a special object of my improvements is to provide an improved meansof operatlng the spindle. In the drawing I have shown my invention app-lied to a machine for boring automobile engine cylinders.

Figure 1 is a perspective view of part of a machine embodying my invention.

Fig. 2 is a sectional view of the operat.

ing parts to an enlarged scale.

Fig. 3 1s a vlew similar to Fig. 2 in a planeat rightangles to the plane of Fig. 2.'

Fig. 4 is a plan view of apart ofsaid apparatus.

Fig. 5 is an elevation of a part of the apparatus shown in Fig. 4 looking from the leftof said'figure, theflever [a being shown in section. i

, Fig. 6 is a detailed plan view showing the upper "face of the gear Wheel Referring first to Fig. 1, a. is-the bed of the machine, a the upright-or standard, a a. casing extending from the top of the standard a over the bed a and containing most of the operating mechanism. b is the boring bar which extends vertically through the casing a 6 is a ring adjustable to different positions upon the boring bar 7). The function of said ring is to strike against the leverm to trip the mechanism as hereinafter described. m is a handle by which the tripping lever in may be manipulated. m is a spring holding the leverm in engaging position. 73 is a lever arm by which the mechanism within the casing a may be thrown a is a pulley which receives a engaging the threads of said bar.

"ing casing a 0 is the pulley from Which'the bar but permits the wheel '6 to move freely longitudinally of said bar. The pinion d engages the bevel gear wheel 6 to drive the latter.

f is aspur jgear wheel surrounding the boring bar 6 and having internal threads The wheel f is just above and rests upon the wheel 6. I i

g is a spur gear wheel sleeved upon the boring bar '7) andhaving a key 9 engaging in thekey-Way 6 of the boring bar. The wheel 9 is just above and rests upon the wheel I Referring to Fig. 3, h is aspur gear wheel adapted to rotate upon a linedarbor 1 parallel to the boring bar, its teeth engaging the teeth of thesp-ur wheel g. j is a spur gear wheel bearing upon a portion 1 of the arbory, its teeth engaging the teeth of thegear wheel 7. The gear wheel-h in the wheel and the gear wheel in. is slightly greater in diameter than the adjacent gear wheel y. I

70 is a cylindrical standard secured to the ,gear wheel h coaxial therewith and extendangthrough the corresponding aperture 111 the wall of the casing at The upper end of the standard is provided with a .groove and ring of conventional construction, the

ring being engaged by an adjacent lever s as, shown. 70 is a spring actlng to force the standard]; upward. The upward movement of said standard is limited by a head k adjustably connected with the arbor y. The standard 71 is secured to the gear wheel 7i.

7' is a circular groove cut in the upper operative position of the mechanism. is diill) llil) longitudinally for the engages in the groove j or said standard may be released and allowed to rise under the influence of the spring until the pin If is withdrawn from the groove j n is a handle by which a bevel gear wheel a may be rotated. The bevel gear wheel 17, carries with it a bevel gear wheel a rigidly secured to which is the spur gear wheel a the teeth of which engage the teeth of the wheel w The operation of the above described device is as follows: p

The handle 10 is pressed downward carrying with it the standard is and gear wheel 72.. This engages the pin 7&2 in the groove i and when said pin engages the stop j the rotary motion of the wheel it will be conveyed to the wheel j.

The shaft (Z being rotated from the belt 0 drives the gear wheel 6 by means of the spur wheel (Z thus turning the boring bar I). The rotation of said bar carries with it the spur wheel 9 which (Fig. 3) rotates the gear wheel h and therefore the gear wheel 7' from which the motion is conveyed to the gear wheel f which is threaded upon the boring bar. Owing to the difierence in the sizes of the wheels f, g, h and the rotary motion of the wheel will be somewhat less than that of the boring bar and owing to this difference in the rate of rotation the wheel f will act as a nut to force the boring bar purpose of feeding it to its work.

When the standard is has been pressed down by the lever arm 70 as above described, it is held in this position by a pawl or catch m upon the tripping lever m engaged by the turning of said lever about its pivot m under the influence of the spring m (Fig. 2). The catch m engages over a catch 70* on the lever 70 thus holding said lever in its depressed position and therefore the mechanism in engagement as described. When the boring bar has descended the required distance for which the ring 6 is adjusted in position on the boring bar, said ring strikes against the lever m rocking it about its pivot m and releasing the catch m The spring 7: then throws the standard is upward withdrawing the pin 7& from the groove j and disengaging the gear wheels h and The rotation of the boring bar and the wheels 6 and g keyed thereon will then no longer turn the gear wheel and feed the boring bar longitudinally. I

hen the feeding mechanism has been put 7' (Fig. 6) is a fixed pin interposed wheel or nut f thus moving the boring bar in the direction of its length.

Claims:

1. In an apparatus of the kind described having a threaded boring bar provided with a longitudinal key-way, a power receiving gear wheel sleeved upon said bar and engaging in said key-way, a second gear wheel sleeved upon said bar and having interior threads engaging the threads of said bar, means for engaging said gear wheels together so as to secure differential movement, and automatic means adapted to disengage said gear wheel at a definite position of said boring bar. I

2. In an apparatus of the kind described,

having a threaded boringbar provided with a longitudinal key-way, a power receiving wheel sleeved upon said bar and engaging in said key-Way, a second gear wheel sleeved upon saidbar and having interiorthreads' engaging the threads of said bar, and gear wheels h, j, meshing respectively with the named gear wheels located upon an arbor parallel to said bar and having difii'erent diameters, means for engaging the wheels h and j with each other and disengaging the same, and an automatic means adapted to automatically disengage the wheels h and j at a definite position of the boring bar.

3. In an apparatus of the kind described, having a threaded boring bar provided with a longitudinal key-way, a power receiving wheel sleeved upon said bar and engaging in said key-way, a second gear wheel sleeved upon said bar and having interior threads engaging the threads of said bar, and gear wheels h, j, meshing respectively with the first named gear wheels located upon an arbor parallel to said bar and having dif ferent diameters, means for engaging the wheels h and j with each other and disengaging the same, and a lug upon said boring bar adapted to engage the engaging means between the wheels 71, and j and re lease the same.

4:. In an apparatus of the kind described having a threaded boring bar provided with a longitudinal key-way a power-receiving gear wheel sleeved upon said bar and engaging in said key-way, a second gear wheel sleeved upon said bar and having interior threads, engaging the threads of said bar, a third gear wheel sleeved upon said bar and having a key engaging in said key-way, the second gear wheel being intermediate the first and third gear wheels, and gearwheels it, j, upon an arbor parallel to said bar and have different diameters, the gear wheel h engaging the third gear wheel and the gear Inc wheel j engaging the second gear wheel, and means for engaging or' disengaging the wheels h and j, the one with the other.

5. In an apparatus of the kind described having a threaded boring bar provided with a longitudinal key-way, a power-receiving gear wheel sleeved upon. said bar and engaging said key-way, a second gear wheel sleeved upon said bar and having interior threads engaging the threads of said bar, a third gear wheel sleeved upon said bar and having a key engaging in said key-way, the second gear wheel being intermediate the first and third gear wheels, but gear wheels h, j, upon an arbor parallel to said bar having different diameters, the gear wheel h engaging the third gear wheel j being provided with a concentric groove on its surface adjacent to the wheel h, the wheel it being provided with a pin adapted to engage in said groove and means for separating the gear wheel h from the gear wheel 7' to withdraw said pin from said groove or for permitting said pin to enter said groove, said groove being provided with a stop j G. In an apparatus of the kind described having a threaded boring bar provided with a longitudinal key-way, a power receiving gear wheel sleeved upon said bar and engaging in said key-way, a second gear wheel sleeved upon said bar and having interior threads engaging the threads of said bar, means for engaging said gear wheels together so as to secure differential movement and a spring tending toin'terrupt said engagement, a catch device for holding said means in position to make said connection andautomatic means for releasing said catch.

7. In an apparatus of the kind described having athreaded boring bar provided with a longitudinal key-way, a power receiving gear wheel sleeved upon said bar and engagmg in said key-way, a second gear wheel sleeved upon said bar and having interior threads engaging the threads of said bar, a third gear wheel sleeved upon said bar and having a key engaging in said key-way, the second gear wheel being intermediate the first and third gear wheels, and gear wheels h, j, upon an arbor parallel to said bar and having different diameters, the gear wheel h engaging the third gear wheel and the gear wheel 7' engaging the second gear wheel,

a spring adapted to separate the gear wheels 72., j, a catch device for holding said gear wheels in engagement, and automatic means for releasing said catch.

In testimony whereof I sign this specification.

JOSEPH w. MYERS. 

